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From Elxis Official Documentation

IOS Reservations comes with a number of built- in modules, bots, payment gateways and other types of plug-ins that will extend the features of the IOS Reservations hotel booking engine. You can any time download more, build your own or buy one from a third party company that is an official Is Open Source partner.

Modules

• Featured Hotel. Displays a specific or a random hotel as featured along with its rooms and the lowest price for each room.
• SSL language. Standard Elxis language module modified for usage in sites where the SSL switch is enabled.
• SSL login. Standard Elxis login module modified for usage in sites where the SSL switch is enabled. Notice that this module is included into Elxis 2009.1 core. So, use it only for Elxis 2009.0 or prior versions.
• Select currency. Shows a currency selection list. On currency change all prices are being displayed to the new currency.
• Location hotels. Displays a list of hotels for a specific or random location.
• Hoteliers. Displays to the hoteliers a link to the Control Panel or a special message if their account have expired or they are not allowed to access the front-end control panel.
• My Reservations. Displays a list of the latest reservations made by a user.
• Destinations Menu. Displays a vertical or horizontal menu consisted by IOS Reservations destinations.
• IOS NoobSlide. Slides a number of images using MooTools. The module can also be used independently from IOS Reservations. IOS NoobSlide documentation
• Check availability. Displays a rooms search form for any hotel. Possible module orientations: Vertical, Horizontal and Block horizontal.
• Advanced Check availability. Displays the advanced check availability search form.
• Destinations. Displays destinations. Many options to set the final output (requires IOSR 3.5+).

Check availability module in Horizontal Block style

Bots

• Search Hotels. Extends standard Elxis search to IOS Reservations hotels.
• Easy Gallery. Multi-purpose image gallery bot that allows you to display image galleries for IOSR locations or hotels, or from custom images inside Elxis content items (articles). Easy Gallery documentation